It is one of the most famous and well-loved problems in chess. In 1983 the readers of a German computer chess magazine reported that no computer at the time came anywhere close to solving it. I asked Ken Thompson to run it on his Belle machine and we were impressed that the reigning world computer chess champion produced the solution in two minutes and 20 seconds. Today a random chess engine takes 0.00 seconds. Once again: pull out that old chess set and work it out all by yourself.